‘Rick Santorum has never been considered a go-to guy for Big Business on Capitol Hill. After all, some corporate types are nervous about his blue-collar roots, his populist proclivities, and his emphasis on religious issues.” So began a Business Week story in January 2006. At the time, Santorum was scrambling to raise money for his reelection campaign against Democrat Bob Casey, a race he ultimately lost. Six years later, however, the perception persists. And at least one corporate type — Mitt Romney — is nervous about Santorum’s rising Rust Belt appeal.